Resident earning outside india for 3months

An Indian Resident Was Working in India For F. Y. 12-13 From April - November. In December he gets employed in Saudi Arabia. The Salary he received for 3months from Jan to March is in Indian A/c HDFC Bank Normal A/c i.e. neither NRE A/c Nor NRO A/c.                 

     His shift includes 35working days & 35 non working days i.e. while he is off from work he visits india every 35days later. For F. Y. 13-14 will he be an Resident / Ordinary Resident or Non Ordinary Resident. 

Now From April he has opened an NRE A/c in India in which he receives his salary?

So the salary earned in NRE A/c is taxable or not?

Kindly provide further guidelines to explain me in detail.

Thanks in Advance.