The Divi Theme allows you to set a phone number and email address to be shown at the top of the header, as well as a number of social media icons. To right align these top header text and icons, you can use the following CSS:

@media only screen and (min-width: 768px) {
    #et-info { float:right !important; }
}

On mobiles it will default to a centered layout (as the standard left aligned icons do).