Quarantine is correct. Any questions on proper quarantine, just ask.
Sounds like he could use a small soak to help with his shed - however - do not submerge him.
I put about a 1/4 inch of warm (80F) +/- water in a small container I can seal to avoid escape (but it has holes or a lid so it is not airtight - obviously). Then I cover the container with a towel if the lid has vents, or don't bother if the container has small breathing holes.
I'd let him sit in there for 1/2 hour and see how the shed looks and if you have to, gently work it off with a wet towel (at least room temp or a little warmer - use a temp gun - same for the water temp in the container).
This will help the shed and help him hydrate.
Make sure he has fresh water in his tank. Your temps look good and I assume are thermostat controlled. If it's possible, but some tin foil over the tank if it's open at the top to help keep humidity in.
I would also plan to feed him several days after the soak. If he eats F/T (feed what the breeder has for now because food is important), I would warm the F/T prey item with warm water (I soak my python food for 30-60 seconds in 110F water to warm it up and get a good food response) after defrosting, but instead of drying off, offer damp (shake excess water off) and that will add to him hydrating as well.
Keep on eye on him and keep us posted. Hopefully just a bad shed and a little dehydration is all.
Good luck.