There are many sacred stories within christianity. Again it depends on the church. In the Catholic Church teaches many sacred stories feature the lives of the Saints and other revered persons.
Myths include stories about creation, why the world is as it is, how people came into existence, how they relate to the land and the law each person must follow.
Stories containing a message and often humour.
Sacred stories are found within the scriptures. The Jews do not recognize any of the stories as myth. For those who are not Jewish a good example of myth is the creation story in genesis.
Story of creation is similar to the Christian and Traditions.