How to transform Appearance value or slider value in Manipulate?

My code is more involved, but my question boils down to this. I have a list of values where each entry represents the x-position of a particle at time $t$. These values are calculated by a finite difference scheme and the output is a list $pos={x_1,x_2,ldots,x_n}$,where $x_i$ represents the position at time $t_i=i*delta$ and $delta=0.1$. Code that illustrates my question is

pos= {0., 0.64, 1.8688, 3.6393, 5.90815, 8.63549};
n=Length[pos];
Manipulate[pos[[k]], {{k, 1, "t"}, 1, n, 1, Appearance -> "Labeled"},
Alignment -> Center, ImageMargins -> Large, ControlPlacement -> Top]

On the left side of the slider I have label $t$. On the other end of the slider the values of k are displayed. Can some tell me how to change this code so that rather than "k" being displayed, .1k is displayed?