This code snippet will add a "Page Header" widget area to your Genesis child theme below the header and within the wrap. It will show site-wide by default, however, you can use a widget visibility plugin such as included in Jetpack to hide or show the widget in certain areas of your site.

functions.php

//* Register Page Header
genesis_register_sidebar( array(
    'id'    => 'page-header',
    'name'    => __( 'Page Header', 'genesis' ),
    'description'    => __( 'This is the Page Header area.', 'Genesis' ),
) );

//* Add the Page Header
add_action( 'genesis_after_header', 'genesis_page_header' );
function genesis_page_header() {
   genesis_widget_area( 'page-header', array(
	'before' => '<div class="page-header"><div class="wrap">',
	'after' => '</div></div>',
   ) );
}