ceiling height

This may seem like a silly question, but, I would like to know if the stated 6'4" ceiling height in the trailmanor brochure is the "most" or "least" value. I notice there must be a 2" or so difference in ceiling height from one side of the cabin to the other, so I want to know if the ceiling goes from 6'4"-6'6" or 6'4" to 6'2". I may be purchasing a unit sight unseen, and since I am 6'4", I'm really interested in knowing this info.

Thanks!