Ge 47:7 Then Joseph brought in his father Jacob and set him before Pharaoh; and Jacob blessed Pharaoh.
 8 Pharaoh said to Jacob, "How old are you?"
 9 And Jacob said to Pharaoh, "The days of the years of my pilgrimage are one hundred and thirty years; few and evil have been the days of the years of my life, and they have not attained to the days of the years of the life of my fathers in the days of their pilgrimage."
 10 So Jacob blessed Pharaoh, and went out from before Pharaoh..

Moses' main point here is to show his original Israelite readers that Jacob, their forefather, blessed Pharaoh. Moses was reminding them of their privileged position that they were to be a blessing to the nations, that anyone or any nation that blesses Jacob or Israel will be blessed as well.

Ge 12:2 I will make you a great nation; I will bless you And make your name great; And you shall be a blessing.
 3 I will bless those who bless you, And I will curse him who curses you; And in you all the families of the earth shall be blessed."