In my t-distribution table, I don't see an area in one tail of .04 since they use standard values such as .005, .01, .025, .05 and .10. Also the degrees of freedom closest to 84 (if I go to the next highest number) is 90.

How do I determine the .04 number within the standard values shown in the table?

And, am I correct that if my df=84, I use the '90' row of numbers?

Thank you.