Could be two reasons -- either these (sample?) tests are less difficult so 40% of those who tried scored >93-96, or 60%ile relative only to those who try not the general UMAT cohort.
In the year just now overall score (sum of 3 sections) for 100th percentile was 210+ marks.
So just need to score 70 marks out of 100 per section.
But you should aim to achieve close to uniform marks across. If you drop say 10 marks below 70 in one section it's tough to gain those 10 back in another because you approach its super difficult zone.