Yeah, he hasn't shed yet. Do they only grow when they shed?

In the morning-afternoon I'm mostly at school, when I come home hes usually inside, but like right now hes up on the walls of the tank looks like hes trying to get out, I took him out twice now and is constantly moving. Maybe he just wants to slither around? I'm not sure. Right now its 84ºF in there, the lamp is on, one side is warm, the other side is cool. Water is fresh.