Use align left, align right, or align center to move the image to the correct position, or edit the HTML of the letter to position your image the way you would like. 
Acknowledgement letter images

Disclaimer: This article assumes you are familiar with HTML/CSS/JavaScript and the tools used to create and modify this code. Blackbaud Customer Support may help explain where the code should live in the product, but we will not modify or assist you with modifying or troubleshooting these examples.