If you want admission in SPA then 280+ is a good score

If you want admission in NIT then 230+ is a good score

If you want admission in any state college of architecture then 200+ is a good score

Below 200 there is no scope of admission in any of the govt. colleges for those who belong to general category

200 marks can be considered as a good is going paper 2 of JEE main but as a difficulty level changes every year there for you should keep track of others and you will get soon realise how much is it good or not by analysis of  coachings come out so just wait for few days and later you will get idea but as per the previous years record it can be considered as it good but not very good.