If you actually created a new Apple ID, you will NOT be able to update any App Store purchases that you made with the other ID as all of these purchases will be tied to that other ID ... and you will NOT be able to transfer them to the new ID.
On the other hand, if all you did is change the email address for your existing Apple ID, then the following article should prove helpful: What to do after you change your Apple ID email address or password - Apple Support