I am 184cm tall, and I have adjusted my seat to a decent distance from the steering wheel, not like a Chapel street cruiser, and the angle from the seat to the rear bottom seat belt bolts from the horizontal is 38degrees - and CAMS states a maximum of 40deg, and with 0-10deg being a recommended range.
If a driver is shorter chances are his seat will be even further forward, hence the angle will be less than what I have.