8-10% bf, absolutely not 6%
at 6'2, 242 I wouldn't put him the "huge" category... for physique he's in line, but if he wanted to compete in bodybuilding would have to add 30+ lbs at the same bf%... 5'10, 242 would be more like a bodybuilder
that all said, he's worked hard on diet and training to achieve this... most people, I mean 98% of people, don't have the will power to stick with something long enough to see these results