My percentile is ranging from 88.72 to 97.26 in the three CAT Free Mocks. Is it possible to score at least 90+ percentile on the D-Day?

Craku's three free mock tests will not give you the idea of actual percentile, since anybody can give these. If you want to check appear for any dashcat. They are paid and given by serious aspirants.
You can also compare your free test's score with cat 2020 score vs pr.

mera toh 20 ile aaraha hai ek saal coaching kiya time se coachung kiya kya mere chances hai 80 le ke bhai aap kaise leke aagaye ho koi trick bata do na