add_action('woocommerce_archive_description', 'custom_archive_description', 2 );
function custom_archive_description(){
if( is_product_category() ) :
remove_action('woocommerce_archive_description', 'woocommerce_taxonomy_archive_description', 10 );
add_action( 'woocommerce_after_main_content', 'woocommerce_taxonomy_archive_description', 5 );
endif;
}