Another option is to use the sumome plugin. It scrolls with your user. Plus its free!
In the menu where you uploaded the logo image. It should now be in your gallery. So click your image and in the right corner there is an edit button. From there resize your image to your specifics. Remember to hit update. Now you must go back to the logo tab in customizer and reselect the image in your galary. Notice that when you click it it will be to the size you specifed in the right hand corner. Save and Publish
In the customize menu scroll down to “widgets”. Click the our focus widget if that’s what your trying to edit. Click ad widget go down to were it says zerif our focus widget . Here you can change the image text and link.