If you are logged in to a Team with Enterprise account then you are not able to create AppStore profiles. Probably you are logged in to the wrong team (try logging out and logging in again, then you'll be able to select the proper team). If you are logged in the proper team with enterprise account then on the new provisioning profile screen you should see just 3 options:
- iOS App Development
- In House (which is the enterprise prov profile)
- Ad Hoc