I think what you are asking is changing the text +NEW to ADD Deal.
This code is adjusted like that.
add_action( 'admin_bar_menu', 'change_new_post_name', 999 );
function change_new_post_name ( $wp_admin_bar ) {
//Removing +New
$wp_admin_bar->remove_node( 'new-content' );
//hyperlink for the new link. This can be anything. Currently it's default.
$link = get_bloginfo('url').'/wp-admin/post-new.php';
//Parameters to create a new node
$args = array(
'id' => 'new-content', //re-creating the +New
'title' => 'ADD Deal', //Giving it a different title
'href' => "$link" // Above created link
);
$wp_admin_bar->add_node( $args );
}