\score
{
<<
- \context ChordNames \harmonies
- \context Staff
+ \new ChordNames \harmonies
+ \new Staff
{a8^\markup { \fret-diagram #"6-x;5-0;4-2;3-0;2-0;1-2;" }
% THE FOLLOWING IS THE COMMAND TO MOVE THE FRET DIAGRAM
\once \override TextScript.extra-offset = #'(10 . 0)