With the default testimonial element this layout is not possible, however you can use custom CSS to change the position of elements a bit in this case.
Avada contains a plethora of options that allow you to customize the style of the theme without any coding knowledge. But even our large amount of options cannot cover everything. This request you have will require custom CSS.
However we have some great resources for you! This post below explains how to use custom CSS with any of our shortcodes, and also gives you two of the most popular browser developer tools to find the correct selectors; Firebug and Chrome Developer tools. There are video tutorial links in it as well.
How to make custom CSS changes: