|Highlight the cells you don't care if they are deleted, can hold down Control and click each cell one by one to highlight ones that aren't side by side. Right click, Format cells, Protection and uncheck the locked button. |
Once done select the cells that you don't want to be deleted in the same manner. Go to top of sheet click on Tools, Protection, protect sheet. It will then ask for a password, enter that, then enter again when prompted and there you go. only the cells you did first will be the ones you can change he text inside of.