My chinese friend translated to the following:
Remember that the characters are read right to left, opposite of us:
First 2 characters (2 right-most characters): Happiness (in traditional chinese)
Following 3 characters: Forever (as in, forever be happy and prosper)
Next character: The authors name, Xiao Yang
Next character: "created this"
Following 4 characters: the year of the painting, 1984
All together, right to left: "Happiness and prosperity forever, from Xiao Yang, 1984"