how can I shift a word a part of pixel in a text?

I am working on an algorithm in text watermarking ,I chose a key word ,but how can i shift the previous and the next word of the key word by a part of pixel?

[Walter Roberson]

Suppose you had the array A = [0 0 0; 0 8 0; 0 0 0] and you need to shift the central 8 by part of a pixel. What result would you like to get?