no offence to your shaper but that is MILES too big. is he experienced in making them? i weigh the same as you and im about an inch shorter. i've ridden a 5'6 with no problems at all and it was a freakoid from Dale @ Ectic so it was quite a radical evolution on the traditional simmons shape. i reckon i could have even gone 2'' shorter. i also have a 6'2 simmons and its WAY too big. i ride it like a longboard. if he's planning on making it 22ish wide and 3'' thich, at 6'10 you might as well put a mast and sail on it.
go for a 5'8. thats my advice. you will still be able to duck dive it and the volume will hold your weight easily.
/\ What he says. I'm 6'2", 200 lbs. I like bigger boards and I reckon 5'-8" to 5-10" would be what I'd go for personally, after riding one in that range. Others of similiar stature would probably go shorter. I'd say 6' Max.