Thanks - it's the Hip point?
I don't think the H-point could be a whole lot lower - the Trev is a battery powered vehicle and the floor is where the battery pack needs to be, for the lowest Cg possible. The top of the canopy (made by a sail plane builder - can you tell?) is probably just over 4' high - and its the apex on a very sleek dome. Improving the Cd by 0.01 would be much more meaningful.
That looks like a 14" Honda rim to me? If so, the tire would be about 2' and the apex of the canopy would be about 4'-3" above the ground.
Here's a photo with three people (one short, one average, one tall):
Here it is with some school age kids:
These people are bent over to look in, and they are still taller than the car: