Hi

It's quite difficult to predict your percentile score with 168 marks as percentile score for the same marks  keeps changing every year depending upon various factors like number of students that appeared in the exam, kind of marks obtained by them , toughness level of the examination etc.

But if we look at previous year trends, then with 168 marks your percentile score will be approximately 99 percentile.

For example,

Last year JEE mains was of 360 marks and from this year it is of 300 marks, so when we when we convert

168 marks out of 300 into marks out of 360 , it is

=168/300 * 360

=  201 marks out of 360 marks,  which corresponded to  99.45 percentile in jee mains 2019.

So, with 168 marks out of 300 in jee mains 2020 your percentile score will be approximately 99 percentile.

For details go through

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

Thank you