I need a way to limit the meta box to a single page (ID=84) ... if I do the following it works, but sbumit data does not go through and data is not saved ...

add_action('admin_init','violin_init');

function violin_init()
{
    if ($_GET['post'] == '84')
    {
        wp_enqueue_style('violin_admin_css', VIOLIN_THEME_PATH . '/custom/meta.css');

        add_meta_box('violin_options_meta', 'Highlight Content', 'violin_options_meta', 'page', 'normal', 'high');

        add_action('save_post','violin_save_meta');
    }
}