I put in my height of 6'0" and this is the advice I received:

Chair height: 18 - 19.5 in > Your thighs and feet should be parallel to the floor (thighs and lower legs forming 90°-110° angle). > Desk height: 27.5 - 30.5 in > Your elbows and forearms should lie straight on the table. Make sure there is a 90°-110° angle at the elbow.

I'd love to see the math on how this works out. Pretty sure this is humanly impossible unless my upper arm happened to be about 9 inches long.