I am trying to create a data validation rule for NAME attribute. My conditions are::

1. it should be text and may also contain "." and space.
2. length of name should be greater than 5 but less than 85 characters
3. the cell should not be blank

I have created a validation rule, but when I insert text of length greater 5 say 6 or 10 its showing error. I think my rule is mistake. Please help!
IF(ISTEXT(B2),AND(LEN(B2)>=5,LEN(B2)<=85),B2=".")
It is not working as expected.