a) Compile your app in release mode
b) https://developer.apple.com with store certificates as described here: http://www.b4x.com/android/forum/threads/publishing-your-app-to-the-app-store.57528/#content
Download the compiled app to the PC with Tools - Build Server - Download last build.
https://itunesconnect.apple.com Create a new app record in iTunes Connect and save it.
@TODO Fill your iTunes Connect user name and password. Choose the previously downloaded archive.zip file.
@TODO Click on the upload button. Note that this step can take several minutes (even more than 10 minutes). You can continue to work during the upload.