Hey Aspirant, 72 percentile is a really low percentile score for Jee mains paper 2.

At this score, your expected rank is about 50 thousand.

Admission in B.arch in SRM Chennai are given on the basis of NATA score of candidates only and Jee mains paper 2 scores is not allowed.

You can check the previous year cutoffs of various colleges for B.Arch on the link below:

https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning

Hope this helps.