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If not opening files from SharePoint, skip steps 1-4.
1. Log in to https://portal.office.com and locate desired file
2. Click on ellipsis (three dots) next to file name and select Open>Open in App
3. Select Open in Word (Desktop)
4. If necessary, choose View>Edit document
5. Then go to Review tab at the top and click on Show Comments if they are not already displayed
6. In the Review tab and the Tracking section of the ribbon, click on the small arrow in the bottom right corner
7. Click on Advanced Options...
8. At the bottom, next to Paper orientation in printing, select Preserve
9. Click OK and OK again
10. Try to print and see if you have the same issue
If the issue persists, you can go back to the Advanced Options as described above and increase the Preferred width in the Balloons section.