Mix the voice-over and the music into an audio track.
10 points for a mix that is loud and clear.
8 points for a mix that is in any way muddled.
4 points for a mix that is so hard to hear we miss what was said.
video tutorial: Adobe Premiere CS5 Mixing Music And Voice in Video Tracks
This tutorial used an older version (Creative Suite 5). The interface is very similar to your Creative Cloud version, and the process and the great tips here are still relevant to your task.
Background music for your video