In the demo the image above the columns is in the text box with the text. It is called “Text area 1”. Just add the image code into the text box.
For example:
<img src='https://www.yourdomain.com/wp-content/themes/nirvana/images/columns/cake1.png' style='float:left;padding-right:20px' alt=''><br><br>
I hope this helps!