I'm glad to tell you that you ARE eligible to get admission in Thapar University, Patiala. The cut-off of TIET Patiala depends on whether you are from Punjab or are from outside. The cut-off for Computer Engineering in TIET is:

1. 10980 rank or 98.90 percentile in JEE Main (Outside Punjab)

2. 15398 rank or 98.43 percentile in JEE Main (Punjab)

So, it would be safe to assume that you will be able to get Computer Engineering in TIET Patiala at around 98.90 percentile if you are from outside Punjab and around 98.43 percentile if you are from Punjab.

Hope I have answered your question. All the best!