Bouncy new shocks

Sounds to me like the shocks are not doing their job, probably to light for your MH.

Shocks have a break-in period. Until they wear-in, the stiction can be brutal.
I once installed new struts on our Eldorado and thought I had ruined it - it road like a kids wagon! Two weeks later it rode like a.. well, Cadillac.

My thoughts… First, what shocks did you have installed? It surprises me that you let the truck stop install a set and do not know what they chose. Since you have a Ford chassis I assume the originals were Bilstiens. The replacement Bilstiens ) spec’d by Bilstien) are not the same as original (spec’d by Ford) but provide a better ride. Anyhow, what tires do you have, and have you set the pressures according to the tire chart? Using the GAWR is a good place to start if you don’t know your actual. I’ve found traveling with full fuel, full water provides a better ride. One thing that also adds to a better ride is to slow down.

He could be talking porpoising?

Bouncy to me would make me think tire balance .You said tires were new possibly you lost a wheel weight. I wouldn't be over inflating max recommendation on side of tire. That shouldn't cause bounce but will ware center of tires.

Need also tire size and ply rating.
Do you have a tag axle?
Even 85 in front maybe too much.
If you have heavy weight behind the driving wheels, it can make the front light and cause bouncing.

What chassis?

What shocks did you just have installed?

If the "85psi recommended" is from the your GVWR plaque? If so, that PSI is based on that axle being loaded to its GAWR. As mentioned by others, this MAY have you way over-inflated. No way to know until you weigh it.

Do not be concerned about the PSI increase while driving. The tire engineers took that into consideration. Their pressure recommendations are "at current ambient temperature before driving".

I haven’t weighed my RV recently but I run my front tires at 90psi recommended is 85psi I have a TPMS and generally the pressure gets up 96psi or so while on the road and my tires are new

Was the service station experienced with heavy RVs? If recent ask them to fix it.

As enblethen mentioned....tire pressure really makes a difference.

Have you weighed your RV and set the tire pressure to the tire manufacturer's recommended pressure?