See marks prediction is never accrurate as it varies with number of applicants, difficulty of question paper and so many oter factors. However, one needs some idea as a base so I would say that if you get above 220, you may stand a chance. NIT Rourkela is again a very preferred NIT ad cutoffs are high. Then 50% of the seats are for Home Quota so if you belong to another state, you have high competition. Check the previous year cutoffs here https://engineering.careers360.com/articles/jee-main-cutoff-for-nit-rourkela

Another thing is that the marks will vary for the engineering branch. The more popular ones like CSE have higher cutoffs. All the best!