Coaches and scouts know that the heights and weights that PG lists are self reported. I'm sure they take them with a grain of salt, and yes they probably take the ones that list actual height with a grain of salt also. Don't worry too much, someone else will add to their height at some point. College coaches often add a bit. I found out my son had grown an inch and a half the other day without my knowing it.
Personally, now that he's 6'2 1/2" we're going to list him at 6'3" just to keep up with the Joneses. Someday.