His records having to do with his actions while in government will, if they are already not, become available.
Personal records cannot be made available without the consent of the person or a very specific court order.
Well as you state it depends on the records they are.
If presidential records he cannot hide.
Obama actually never had power to seal personal records. If you are talking about college records the colleges sealed them, not Obama. If you are talking about birth certificates, the law already keeps those confidential.
What personal records are you thinking of that obama has the power to seal?