Dear candidate

As you said that your score is 90.78 as you did not mention your category In general by considering it as general category  your percentile will be around 90 to 93 and according to your score expected rank may lie around 1.2 lack or higher  and with this rank by comparing with the cutoff trends in IIIT kanchipuram your rank is too far from the yearly cutoff trends so, it is hard for you yo get a seat in IIIT kanchipuram so, with this score and rank it is impossible to get a seat at IIIT kanchipuram and to check the cutoff trends for all other courses and categories visit the below mentioned link

https://engineering.careers360.com/articles/jee-main-cutoff-for-iiitdm-kancheepuram

But you can get many other college so, visit the below mentioned link to predict how many and what college you can get with your score

All the best

Hope this Information is helpful