What is the right direction of the statues (moai) at easter island?

The moai and ceremonial sites are along the coast, with a concentration on Easter Island's southeast coast. Here, the moai are more 'standardized' in design, and are believed to have been carved, transported, and erected between AD 1400 and 1600. They stand with their backs to the sea and are believed by most archaeologists to represent the spirits of ancestors, chiefs, or other high-ranking males who held important positions in the history of Easter Island, or Rapa Nui, the name given by the indigenous people to their island in the 1860s.

One theory is that the statues were positioned as they were so the Easter Islanders could pray to them. The statues were seen as intermediaries between earth and heaven.

Here's a website which you could look at to learn more:

http://www.pbs.org/wgbh/nova/easter/