Hey.
The cut off for admission in government colleges in Tamil Nadu under the State quota for the MBC category in the previous year 2018 a score of 226 marks.
The cut off changes each year due to several factors like level of difficulty or level of Competition etc. This year as the paper was easier the cut off based on marks will be higher than before.
Considering your score, and the previous year last score you seem to have a fair chance of Admission here.
You can use the link below to check the previous year trends.

https://medicine.careers360.com/articles/neet-cutoff-tamil-nadu/amp

Best of luck.

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