documentclass{article}
usepackage{tikz}
usetikzlibrary{tikzmark}
usepackage{colortbl} %%% ALLOWS COLORING OF CELL IN TABULAR ENVIRONMENT
usepackage{amsmath}
usepackage{hhline}
begin{document}
begin{center}
begin{tabular}{|cc|p{1in}|cc|p{1in}|cc|} hhline{--~--~--}
multicolumn{2}{|c|}{tikzmarknode{A}{cellcolor{green!50!white}U.S.}}
 &&multicolumn{2}{c|}{tikzmarknode{B}
{}cellcolor{green!50!white}France}&&multicolumn{2}{c|}
{cellcolor{green!50!white}Japan} \ [5pt] hhline{--~--~--}
 multicolumn{2}{|c|}{$8$} &&multicolumn{2}{c|}{$41frac{1}
{3}$}&&multicolumn{2}{c|}{$260$} \ [5pt]%hhline{--~--~--}
 multicolumn{2}{|c|}{$9$} &&multicolumn{2}{c|}{$42frac{2}
{3}$}&&multicolumn{2}{c|}{$270$} \ [5pt]%hhline{--~--~--}
multicolumn{2}{|c|}{$10$} &&multicolumn{2}{c|}{$44$}&&multicolumn{2}{c|}
 {$280$} \ [5pt]%hhline{--~--~--}
multicolumn{2}{|c|}{$11$} &&multicolumn{2}{c|}{$45frac{1}
{3}$}&&multicolumn{2}{c|}{$290$} \ [5pt]%hhline{--~--~--}
multicolumn{2}{|c|}{$11frac{1}{2}$} &&multicolumn{2}{c|}
{$46$}&&multicolumn{2}{c|}{$295$} \ [5pt] hhline{--~--~--}
end{tabular}
end{center}

begin{tikzpicture}[overlay,remember picture]
draw[red,-latex] ([yshift=5pt,xshift=-5pt]A.north) -- ++  (0pt,24pt)
 coordinate (aux)  -|  ([yshift=9pt,xshift=7pt]B.north) ;
end{tikzpicture}
end{document}