Hook site avatar before site title

functions.php

//* Hook site avatar before site title
add_action( 'genesis_header', 'sixteen_nine_site_gravatar', 5 );
function sixteen_nine_site_gravatar() {

	$header_image = get_header_image() ? '<img alt="" src="' . get_header_image() . '" />' : get_avatar( get_option( 'admin_email' ), 224 );

	printf( '<div class="site-avatar"><a href="%s">%s</a></div>', home_url( '/' ), $header_image );

}