What should be the issue here ?? Ranking fall :(

Can someone please analyze this website and suggest me some way to improve my SEO ?
Actually, i was on page 1st and suddenly my ranking falls down and now stuck on page 2.

I asked suggestions here but, people said it's google update and something like new algorithms. But few new competitors ranking high and aggressively, even the competition is not that much high.

Here is the website: http://rajiasacademy.com

I have already tried different packages here: Sherlock pack of…

What should be the issue here ?? Ranking fall :(