Hello,

Unfortunately, it is not possible with Visual Composer to move a background a bit. But you can try to do this with a CSS code added for mobile devices only. Add some extra CSS class to your row like my-background and then use this CSS

body div.my-background {
	background-position: 50% 0!important;
}

If it will not work for you, try to play with the background coordinates in the code.

Regards