Hi.,
Sorry for the inconvenience cause ,
Google updated few algorithms, so it shows 1 mark only. When theme approved it’s around 70 / 100. Because Themeforest asked to improve. After reaches 70, the theme approved .We needs to improve the speed for mobile devices. We will update this ASAP!!
As of now kindly refer this link for how to increase the theme speed – http://support.wedesignthemes.com/knowledge-base/how-to-increase-the-theme-speed/