Well, 85 is an average score and the admission process for b.arch considers your board marks too. You could calculate the cut off marks by dividing your nata score by 4 and your board marks (per cent) by 2 and can refer your score with the previous year cut off.

Example:-

85/4=21.25 (your nata score) + 90 % /2 = 45 ( assume this to be your board marks) and the total comes up to be 45+21.25= 66.25 . Now compare this with the cut off of various colleges.

ALL THE BEST!